This product utilizes US standard thread

Very strong leather , for fine detailing finishes
Made of very high grade leather and aluminum
Diameter 3/4" (20 mm)
Length 3/4" (20 mm)
For crowns and medium repairs 
Great for aluminum and steel panels
Fits most knockdowns snd blending tips 
The leather tips are very effective but they need special care
Always keep them very clean
Do not use on sharp edges - leather can be easy scratch or damaged